package com.abcgz.grade.config;

import org.apache.shiro.web.servlet.ShiroHttpServletRequest;  
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;  
import org.apache.shiro.web.util.WebUtils;  
import org.springframework.util.StringUtils;  
import javax.servlet.ServletRequest;  
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;

import java.io.Serializable;  
  
public class MySessionManager extends DefaultWebSessionManager {  
  
    private static final String AUTHORIZATION = "Authorization";  
  
    private static final String REFERENCED_SESSION_ID_SOURCE = "Stateless request";  
  
    public MySessionManager() {  
        super(); 
    }  
  
    @Override  
    protected Serializable getSessionId(ServletRequest request, ServletResponse response) {  
        String id = null;  
        Cookie[] cook = WebUtils.toHttp(request).getCookies();
        if(cook != null) {
	        	for(Cookie c: cook) {
	        		if(c.getName().equals("token")) {
	        			id = c.getValue();
	        		}
	        }
        }
        
        //如果请求头中有 Authorization 则其值为sessionId  
        if (!StringUtils.isEmpty(id)) {  
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, REFERENCED_SESSION_ID_SOURCE);  
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID, id);  
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID, Boolean.TRUE);  
            return id;  
        } else {  
            //否则按默认规则从cookie取sessionId  
            return super.getSessionId(request, response);  
        }  
    }  
}  